Zig Requires Chilkat v11.0.0+
Zig
QuickBooks - Automatically Refresh Access Token with No User Interaction
See more QuickBooks Examples
Demonstrates how to automaticaly refresh an expired access token and retry the request after a 401 authorization error.Chilkat Zig Downloads
const std = @import("std");
const chilkat = @import("chilkat");
pub fn main(init: std.process.Init) !void {
const alloc = init.arena.allocator();
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// Get our previously obtained OAuth2 access token, which should contain JSON like this:
// {
// "expires_in": 3600,
// "x_refresh_token_expires_in": 8726400,
// "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
// "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
// "token_type": "bearer"
// }
const json_token = try chilkat.JsonObject.init();
defer json_token.deinit();
try json_token.loadFile("qa_data/tokens/qb-access-token.json");
const rest = try chilkat.Rest.init();
defer rest.deinit();
// Connect using TLS.
// A single REST object, once connected, can be used for many Quickbooks REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
const b_auto_reconnect = true;
rest.connect("sandbox-quickbooks.api.intuit.com", 443, true, b_auto_reconnect) catch {
std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
return;
};
const sb_auth = try chilkat.StringBuilder.init();
defer sb_auth.deinit();
sb_auth.append("Bearer ") catch {};
sb_auth.append(try json_token.stringOf(alloc, "access_token")) catch {};
rest.setAuthorization(try sb_auth.getAsString(alloc));
rest.addHeader("Accept", "application/json") catch {};
rest.setAllowHeaderFolding(false);
// The company ID is 123146096291789
// The employee ID is 58
var response_body: [:0]const u8 = rest.fullRequestNoBody(alloc, "GET", "/v3/company/123146096291789/employee/58?minorversion=45") catch {
std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
return;
};
// If we get a 401 authorization error, then it's likely because the access token expired.
// We can automatically refresh it without interaction from the user.
if (rest.getResponseStatusCode() == 401) {
const oauth2 = try chilkat.OAuth2.init();
defer oauth2.deinit();
oauth2.setTokenEndpoint("https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer");
// Replace these with actual values.
oauth2.setClientId("QUICKBOOKS-CLIENT-ID");
oauth2.setClientSecret("QUICKBOOKS-CLIENT-SECRET");
// Get the "refresh_token"
oauth2.setRefreshToken(try json_token.stringOf(alloc, "refresh_token"));
// Send the HTTP POST to refresh the access token..
oauth2.refreshAccessToken() catch {
std.debug.print("{s}\n", .{try oauth2.getLastErrorText(alloc)});
return;
};
std.debug.print("New access token: {s}\n", .{try oauth2.getAccessToken(alloc)});
// Update the JSON with the new tokens.
json_token.updateString("access_token", try oauth2.getAccessToken(alloc)) catch {};
// Save the new JSON access token response to a file.
// The access + refresh tokens contained in this JSON will be needed for the next refresh.
const sb_json = try chilkat.StringBuilder.init();
defer sb_json.deinit();
json_token.setEmitCompact(false);
json_token.emitSb(sb_json) catch {};
sb_json.writeFile("qa_data/tokens/qb-access-token.json", "utf-8", false) catch {};
std.debug.print("OAuth2 token refreshed!\n", .{});
std.debug.print("New Access Token = {s}\n", .{try oauth2.getAccessToken(alloc)});
sb_auth.clear();
sb_auth.append("Bearer ") catch {};
sb_auth.append(try oauth2.getAccessToken(alloc)) catch {};
rest.setAuthorization(try sb_auth.getAsString(alloc));
// Now retry the request with the refreshed access token...
response_body = rest.fullRequestNoBody(alloc, "GET", "/v3/company/123146096291789/employee/58?minorversion=45") catch {
std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
return;
};
}
// We should expect a 200 response if successful.
if (rest.getResponseStatusCode() != 200) {
std.debug.print("Request Header: \n", .{});
std.debug.print("{s}\n", .{try rest.getLastRequestHeader(alloc)});
std.debug.print("----\n", .{});
std.debug.print("Response StatusCode = {d}\n", .{rest.getResponseStatusCode()});
std.debug.print("Response StatusLine: {s}\n", .{try rest.getResponseStatusText(alloc)});
std.debug.print("Response Header:\n", .{});
std.debug.print("{s}\n", .{try rest.getResponseHeader(alloc)});
std.debug.print("{s}\n", .{response_body});
return;
}
// Load the JSON response into a JSON object for parsing.
// A sample JSON response is shown below.
const json = try chilkat.JsonObject.init();
defer json.deinit();
json.load(response_body) catch {};
// These will be used for parsing date/time strings..
const dtime = try chilkat.DateTime.init();
defer dtime.deinit();
const b_local_time = true;
// Show the JSON.
json.setEmitCompact(false);
std.debug.print("{s}\n", .{try json.emit(alloc)});
// Get some information from the JSON..
std.debug.print("Name: {s}\n", .{try json.stringOf(alloc, "Employee.DisplayName")});
std.debug.print("Id: {s}\n", .{try json.stringOf(alloc, "Employee.Id")});
std.debug.print("City: {s}\n", .{try json.stringOf(alloc, "Employee.PrimaryAddr.City")});
std.debug.print("PostalCode: {s}\n", .{try json.stringOf(alloc, "Employee.PrimaryAddr.PostalCode")});
// Load the CreateTime into a CkDateTime...
dtime.setFromTimestamp(try json.stringOf(alloc, "Employee.MetaData.CreateTime")) catch {};
const dt = try chilkat.DtObj.init();
defer dt.deinit();
dtime.toDtObj(b_local_time, dt);
std.debug.print("{d}/{d}/{d} {d}:{d}\n", .{ dt.getMonth(), dt.getDay(), dt.getYear(), dt.getHour(), dt.getMinute() });
std.debug.print("Success.\n", .{});
// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON
// ------------------------------------------------------
// The JSON response looks like this:
// {
// "Employee": {
// "SSN": "XXX-XX-XXXX",
// "PrimaryAddr": {
// "Id": "116",
// "Line1": "45 N. Elm Street",
// "City": "Middlefield",
// "CountrySubDivisionCode": "CA",
// "PostalCode": "93242"
// },
// "BillableTime": false,
// "domain": "QBO",
// "sparse": false,
// "Id": "98",
// "SyncToken": "0",
// "MetaData": {
// "CreateTime": "2015-07-24T09:34:35-07:00",
// "LastUpdatedTime": "2015-07-24T09:34:35-07:00"
// },
// "GivenName": "Bill",
// "FamilyName": "Miller",
// "DisplayName": "Bill Miller",
// "PrintOnCheckName": "Bill Miller",
// "Active": true,
// "PrimaryPhone": {
// "FreeFormNumber": "234-525-1234"
// }
// },
// "time": "2015-07-24T09:35:54.805-07:00"
// }
}